Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Summary of Stock-Based Compensation Activity - Stock Options) (Details)

v3.8.0.1
Stock-Based Compensation (Summary of Stock-Based Compensation Activity - Stock Options) (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
$ / shares
shares
Shares  
Outstanding at December 25, 2016 | shares 316,027
Granted | shares 0
Exercised | shares (35,170)
Forfeited | shares (6,747)
Outstanding at December 31, 2017 | shares 274,110
Exercisable as of December 31, 2017 | shares 248,745
Weighted Average Exercise Price  
Outstanding at December 25, 2016 | $ / shares $ 18.64
Granted | $ / shares 0.00
Exercised | $ / shares 9.67
Forfeited | $ / shares 28.91
Outstanding at December 31, 2017 | $ / shares 19.54
Exercisable as of December 31, 2017 | $ / shares $ 18.59
Weighted Average Remaining Contractual Term (Years)  
Outstanding at December 31, 2017 4 years 1 month 28 days
Exercisable as of December 31, 2017 4 years 18 days
Aggregate Intrinsic Value  
Outstanding at December 31, 2017 | $ $ 2,429
Exercisable as of December 31, 2017 | $ $ 2,427